Precise measurement of the form factors in $D^0\to K^{\ast }(892{)}^{-}{\mu }^{+}{\nu }_{\mu }$ and test of lepton universality with $D^0\to K^{\ast }(892{)}^{-}{\ell }^{+}{\nu }_{\ell }$ decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +688

We report a study of the semileptonic decay $D^0\to {\bar{K}}^0{\pi }^{-}{\mu }^{+}{\nu }_{\mu }$ based on a sample of $7.9{\mathrm{fb}}^{-1}$ of $e^{+}{e}^{-}$ annihilation data collected at a center-of-…